Email this article Decomposition and concentration of sludge water by membrane electrolysis
- Authors: Vasyunina N.V.1, Dubova I.V.1, Druzhinin K.E.2, Gilmanshina T.R.1, Shubkina O.Y.1
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Affiliations:
- Siberian Federal University
- LLC “Indust-PRO”
- Issue: Vol 14, No 6 (2024)
- Pages: 527-533
- Section: Articles
- URL: https://kld-journal.fedlab.ru/2218-1172/article/view/684839
- DOI: https://doi.org/10.31857/S2218117224060098
- EDN: https://elibrary.ru/MAEIOR
- ID: 684839
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Abstract
The article discusses the possibility of using electrodialysis for processing weak aluminate solutions for the purpose of causticization and obtaining strong alkaline solutions is being studied. A three-chamber electrodialysis cell of our own design is described. The cell uses heterogeneous cation exchange membranes MK-40; titanium alloy VT1-0 is used as the cathode and anode material. Electrodialysis was carried out at an interpolar distance of 3–5 cm and a current density of 0.5–3.0 A/dm2 to obtain cathodic (concentrated caustic alkali solution) and anodic (aluminum hydroxide and desalinated solution) products. The optimal operating parameters for the process of electrodialysis concentration of an aluminate solution were selected – the current density is about 2 A/dm2 with an the interpolar distance of 4 cm. It was determined that the soda content in the solution within an hour decreases from 55 to 25–30% at various operating parameters of the electrolylysis process. The degree of concentration of total alkali in the solution at the selected process parameters after an hour reaches 1.40–1.45.
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About the authors
N. V. Vasyunina
Siberian Federal University
Author for correspondence.
Email: gtr1977@gmail.com
Russian Federation, Krasnoyarsk
I. V. Dubova
Siberian Federal University
Email: gtr1977@gmail.com
Russian Federation, Krasnoyarsk
K. E. Druzhinin
LLC “Indust-PRO”
Email: gtr1977@gmail.com
Russian Federation, Krasnoyarsk
T. R. Gilmanshina
Siberian Federal University
Email: gtr1977@gmail.com
Russian Federation, Krasnoyarsk
O. Yu. Shubkina
Siberian Federal University
Email: gtr1977@gmail.com
Russian Federation, Krasnoyarsk
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